I personally disagree with age ratings, I think there should be psycholgical testing in oder to player certain games. Take the Manhunt fiasco a few years ago, the boy didn't kill because he was too young, it was because he was too impressionable, had difficulty distinguishing fiction from reality and already had a predisposition to kill. To quote Marcus Brigstocke "if we were all influenced by the games we played when we were young, we'd be running round in the dark, listening to repetitive music and popping pills."
On the other thing, when I was 7/8 I was a massive Civ player (and other games like it) so I don't think it's because children are too thick, perhaps it's because we live in an age of instant gratification. Ho-hum.
Ps. Awesome name.